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varghese-oomman

Dr. Oomman Varghese, Associate Professor of Physics

College of Natural Sciences and Mathematics , Department of Physics

FACULTY WEBSITE

  • Areas of expertise

    • Nanomaterials and devices
    • Solar cells
    • Solar fuel generation
    • Environmental sensing
  • Awards

    • Ranked 9th in the Thomson Reuters' list of World's top 100 Materials Scientists in the past decade (selected based on citation impact scores of journal publications)
    • Nominated for 2011 Eni International award in ‘New Frontiers of Hydrocarbons’
    • Listed in Who’s who in America (2007 – 2012), Who’s Who in the World (2008) and Who’s Who in Science and Engineering (2008), Marquis Publishing, NJ
    • University Grants Commission (UGC) and Council of Scientific and Industrial Research (CSIR), India, Lectureship, 1997
    • Council of Scientific and Industrial Research (CSIR), India, Senior Research Fellowship, 1997
    • Indian Institute of Technology Delhi, India, Junior Research Fellowship, 1994
  • Publications

    • Long Vertically Aligned Titania Nanotubes on Transparent Conducting Oxide for Highly Efficient Solar Cells, O.K. Varghese, M. Paulose and C.A. Grimes, Nature Nanotech., 4, 592-597 (2009)
    • High-rate solar photocatalytic conversion of CO2 and water vapor to hydrocarbon fuels, O.K. Varghese, M. Paulose, T.J. La Tempa and C.A. Grimes, Nano Lett., 9, 731-737 (2009)
    • Appropriate strategies for determining the photoconversion efficiency of water photoelectrolysis cells: A review with examples using titania nanotube array photoanodes, O.K. Varghese and C.A. Grimes, Sol. Energ. Mat. Sol. Cells, 92, 374-384 (2008)
    • High efficiency double heterojunction polymer photovoltaic cells using highly ordered TiO2 nanotube arrays, G.K. Mor, K. Shankar, M. Paulose, O.K. Varghese and C.A. Grimes, Appl. Phys. Lett., 91, 152111 (2007)
    • Water-photoelectrolysis properties of highly-ordered titania nanotube-arrays, O.K. Varghese, M. Paulose, K. Shankar, G.K. Mor and C.A. Grimes, J. Nanosci. Nanotechnol., 5, 1158 – 1165 (2005)
    • Extreme Changes in the electrical resistance of titania nanotubes with hydrogen exposure, O.K. Varghese, D. Gong, M. Paulose, K.G. Ong, E.C. Dickey and C.A. Grimes, Adv. Mater., 15, 624-627 (2003)
    • Gas sensing Characteristics of Multi-wall carbon nanotubes, O.K. Varghese, P.D. Kichambre, D. Gong, E.C. Dickey and C.A. Grimes, Sens. Actuators B, 81, 32-41 (2000)
    • Studies of Ambient Dependent Electrical Behavior of Nano-Crystalline SnO2 thin films using impedance spectroscopy, O.K. Varghese and L.K. Malhotra, J. Appl. Phys., 87, 7457-7465 (2000) 

    For more publications, see CV below and google scholar profile, here.

  • Patents

    • High-Yield Visible Light Photocatalytic Conversion of CO2 to Hydrocarbons, O.K. Varghese, M. Paulose and C.A. Grimes, US & European patents pending
    • Fabrication of Highly-ordered TiO2 nanotube-arrays of great length, M. Paulose, S. Yoria, K. Shankar, O.K. Varghese and C.A. Grimes, US patent pending
    • Titania nanotube arrays for use as sensors and method of producing, O.K. Varghese, G.K. Mor. M. Paulose and C.A. Grimes, US patent # 7,011,737 B2
  • Grants and Funded Research

    • None available

    For more research information, see faculty website above, CV below, or visit researchgate profile here.

  • Curriculum Vitae

    • Oomman Varghese CV
  • Contact information

    Science and Research 1, Room 515E
    Phone: (713) 743-3808
    okvarghese@uh.edu
My Home Page
UH Energy
E. Cullen Building, Room 124AB
Houston, TX 77204-2040
713-743-5355
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